Contact resistance of various metallisation schemes to superconducting boron doped diamond between 1.9 and 300 K

Abstract

Diamond is a material that offers potential in numerous device applications. In particular, highly boron doped diamond is attractive due to its superconductivity and high Young's Modulus. The fabrication of stable, low resistance, ohmic contacts is essential to ensure proper device function. Previous work has established the efficacy of several methods of forming suitable contacts to diamond at room temperature and above, including carbide forming and carbon soluble metallisation schemes. Herein, the stability of several contact schemes (Ti, Cr, Mo, Ta and Pd) to highly boron doped nanocrystalline diamond was verified down to the cryogenic temperatures with modified Transmission Line Model (TLM) measurements. While all contact schemes remained ohmic, a significant temperature dependency is noted at Tc and at the lowest temperatures the contact resistances ranged from Ti/Pt/Au with $(8.83\pm 0.10)\times 10^{-4}\Omega .cm$ to Ta/Pt/Au with $(8.07\pm 0.62)\times 10^{-6}\Omega .cm$.

arXiv comment14 pages, 5 figures

References in corpus (5)

• Dependence of the superconducting transition temperature on the doping level in single crystalline diamond films
• Redox agent enhanced chemical mechanical polishing of thin film diamond
• The Diamond SQUID
• A detailed analysis of the Raman spectra in superconducting boron doped nanocrystalline diamond
• Superconducting nano-mechanical diamond resonators

Cited by in corpus (2)

• Superconducting boron doped nanocrystalline diamond microwave coplanar resonator
• Large Microwave Inductance of Granular Boron-Doped Diamond Superconducting Films